Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f24b984bafcee4c…

MALICIOUS

PDF

93.4 KB Created: 2021-03-04 14:09:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ffb9b029729568ac0ba1bb7207b4c627 SHA-1: f47883f0b88546c09aa00c3bb14ef6909f3ef036 SHA-256: 1f24b984bafcee4c368fc19d32a19f6345c5aa3bc44675f28fbed540e79595bf
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to disposable domains and redirectors, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/strik?utm_term=what+was+the+renaissance+period+known+for In PDF document text
    • https://cdn.sqhk.co/besawevij/sD9jjja/nightclub_story_1._0._4._1_mod_apk.pdfIn PDF document text
    • https://nowesepi.weebly.com/uploads/1/3/1/1/131164229/gufodujako-komuxasizuj-wewatumere.pdfIn PDF document text
    • http://apelsins.space/my_appearance_worksheete8uet.pdfIn PDF document text
    • http://vorecan.space/207695108597ldz5.pdfIn PDF document text
    • https://pazijovipa.weebly.com/uploads/1/3/4/3/134327002/giduwadotefazu.pdfIn PDF document text
    • http://gradstroy.su/67665598274p1edx.pdfIn PDF document text
    • https://nivavige.weebly.com/uploads/1/3/0/7/130739715/1703c.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/gabamat_tozexuvubijasi_gigawamenab.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/8371352.pdfIn PDF document text
    • http://matrixbicycles.com/inferno_book_dantekgfg8.pdfIn PDF document text
    • https://lolijizaw.weebly.com/uploads/1/3/4/4/134461821/228643.pdfIn PDF document text
    • https://tirokaroxere.weebly.com/uploads/1/3/2/7/132740449/af46e5e.pdfIn PDF document text
    • https://mogomanazeveka.weebly.com/uploads/1/3/0/9/130969503/poxokomapegise.pdfIn PDF document text
    • https://zelowomuguzak.weebly.com/uploads/1/3/1/3/131379017/jutij.pdfIn PDF document text
    • https://cdn.sqhk.co/gobavata/jFwhhjg/45154851868.pdfIn PDF document text
    • http://blockhcain.host/macbook_pro_autocad_performance3sn1c.pdfIn PDF document text
    • https://cdn.sqhk.co/zirevazul/hbYajcv/72548330383.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/fihjdgc/62335397563.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/jjChejj/xefuketumofufan.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/aa669dec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wuniku/fekeliju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8c53f9-9e00-470a-8991-b62b3ac92d4f/cyberpunk_2077_ps5_pricerunner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bf05aa-2fc7-4ebe-8965-a5d8d24c603a/18647302162.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/nizogibafob.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/washington_state_mens_basketball_record.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511517e1-fb50-43d2-bed0-8f0e2b43f8a3/vuwadisodudijebemimugumus.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12501 5168 bytes
SHA-256: a91ad1ab22563b781ca431709248e0c670711ad98989d0061823f99ada5cefdf
font_01_sfnt_off0001369a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1369A 10456 bytes
SHA-256: dce3edd95227a9c9a8fa534cb0bffec19a2ee05057d9e7ca55ee7ed785eed6f4
font_02_sfnt_off000159e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159E2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3